McConnell, C. R. (1987). Economics: Principles, problems, and policies (10ª ed.). Mc Graw Hill.
Lua i Stíl Chicago (17ú heag.)McConnell, Campbell R. Economics: Principles, Problems, and Policies. 10ª ed. Mc Graw Hill, 1987.
Lua MLA (9ú heag.)McConnell, Campbell R. Economics: Principles, Problems, and Policies. 10ª ed. Mc Graw Hill, 1987.
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